Perhaps you should try some spelling variations:
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
yen tinh » tuyen tinh
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
toan tap » toan ban
co yen » co nen, o yen, ca yen

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co yen tinh - thanh ((trung va) or (trung ha)) trong cong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co yen tinh - thanh ((trung va) OR (trung ha)) trong cong manh toan tap.
• Adding a wildcard symbol may retrieve word variants: co yen tinh - thanh ((trung va) or (trung ha)) trong cong manh toan tap*.